Sketch out your trucks, showing compartments, cab, hose bed, etc. Distribute this to all members. Have them by memory list what and how many (equipment) is in each compartment. Then have them go to each apparatus and see how good their memory is. If memory is not to good, have them use the sketches and list every piece of equipment by compartment on each apparatus. This will keep them fresh on what is on each apparatus and where it is. Use this as a test at a drill.